Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
5.3 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 15.8′, the Mirror Offshore Mk I tops out around 5.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √15.8′ LWL = 5.3 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
Ballast / Displacement
21.1%
Light ballast — tends to be tender; reef earlier than the numbers suggest.
Displacement / Length
206
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
5.3kts
Pounds/Inch Immersion
2lbs
Weight needed to sink the hull one inch — loading sensitivity.
How It Compares
Side-by-side with the boats most often cross-shopped against the Mirror Offshore Mk I.
| Mirror Offshore Mk I | Albin 57 | Com Pac 19 | Cornish Coble | Mirror Offshore Mk Ii | Pampero Amel | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 18.9 | 18.8 | 19.0 | 19.0 | 18.9 | 18.8 |
| LWL | 15.8 | 16.4 | 16.3 | 13.3 | 15.8 | 16.4 |
| Beam | 6.7 | 7.9 | 7.0 | 6.0 | 6.7 | 6.6 |
| Displacement | 1 | 1 | 2 | 599 | 1 | 1 |
| Ballast | 380 | 562 | 800 | — | 380 | 507 |
| Sail Area | — | 167 | 145 | 131 | 152 | — |
| Performance | ||||||
| SA/Disp | — | 18.3 | 14.7 | 29.5 | 17.1 | — |
| Bal/Disp | 21.1 | 31.9 | 40.0 | — | — | 39.6 |
| Comfort | — | 10.1 | 13.5 | 5.7 | 12.4 | — |
| Capsize | — | 2.62 | 2.22 | 2.85 | 2.26 | — |
| Hull Speed | — | 5.4 | 5.4 | 4.9 | 5.3 | — |